My whole body itches like crazy my skin is dry and has dandruff it has been a week and i don't know what to do???

Good Skin Hygiene: Avoid long/hot showers and harsh and drying cleansers. Apply fragrance-free moisturizer like Vanicream, Cetaphil, or Aquaphor immediately after shower to damp skin. Reduce itch with OTC antihistamines. For break-through itch Sarna lotion can be added. Irritating environmental factors should be avoided; stress reduction may be useful. See Allergist if no response.